Shimano GRX DI2 RD-RX817 Rear Derailleur Medium Cage

SHIMANO GRX RD-RX817 REAR DERAILLEUR - 1X11-SPEED DI2 GRAVEL PERFORMANCE

Model: IRDRX817
Series: SHIMANO GRX Di2


KEY FEATURES
Dedicated 1x11-Speed Di2 Design
Engineered specifically for single-chainring gravel and adventure bikes, providing precise, reliable electronic shifting on rough terrain.
SHADOW RD+ Technology
Low-profile design with an integrated chain stabilizer clutch, reducing chain slap and drop for quiet, secure performance on unpaved roads.
Di2 Digital Shifting
Fully electronic shifting system ensures instant, consistent, and maintenance-free gear changes at the touch of a button.
Wide Gear Range Compatibility
Works with 11-42T cassettes, providing the perfect balance between climbing efficiency and high-speed performance.
Automatic Crash Recovery
The Di2 system automatically realigns the derailleur after an impact to prevent damage and maintain precise shifting.
Rugged Trail-Ready Construction
Built with GRX durability for gravel, cyclocross, and adventure riding-sealed pivots and robust hardware handle mud, dust, and debris with ease.
Easy Customization via E-TUBE
Riders can fine-tune shifting behavior, multi-shift functions, and button mapping through Shimano's E-TUBE Project software.


REASONS TO CHOOSE
Purpose-built for gravel and adventure riders who demand Di2 precision in harsh conditions.
Combines the smoothness of road shifting with the stability of mountain technology thanks to SHADOW RD+.
Ideal for 1x GRX Di2 setups where simplicity, reliability, and performance are top priorities.
Offers quiet, accurate, and dependable shifting across wide-range 11-speed drivetrains.


INTENDED USERS
Gravel, adventure, and bikepacking riders using Shimano GRX Di2 1x11 drivetrains.
Cyclists who prioritize electronic reliability, chain stability, and low maintenance for mixed-surface riding.
Performance-oriented riders seeking the perfect balance between technology, toughness, and efficiency.


FULL SPECIFICATIONS
Rear Derailleur: IRDRX817
Series: SHIMANO GRX Di2
Speeds: 11-speed
Compatible Drivetrains: 1x11 Di2 (GRX / Road 11-speed)
Mount Type: Standard rear derailleur hanger
Max Low Sprocket: 42T
Min Low Sprocket: 40T
Max Front Difference: 0T (1x specific)
Total Capacity: 31T
Clutch System: SHADOW RD+ chain stabilizer
Motor Type: Di2 servo motor
Shifting Type: Fully electronic Di2 shifting
Cage Material: Aluminium
Compatibility: Works with Shimano GRX Di2 levers (ST-RX815 / ST-RX817)
Weight: Approx. 287 g
Finish: Matte black with laser-etched GRX branding